centos 没法联接互联网 yum安裝没法应用 出错coul

难题:centos 7.5安裝完以后没法联接互联网,应用yum没法一切正常安裝手机软件,出错could not resolve host: 等。(虚似机安裝或实体线服务器安裝)

详尽出错以下:

Could not retrieve mirrorlist ?release=7 arch=x86_64 repo=os infra=stock error was
14: curl#6 - "Could not resolve host: ; Unknown error"
 One of the configured repositories failed (Unknown),
 and yum doesn't have enough cached data to continue. At this point the only
 safe thing yum can do is fail. There are a few ways to work "fix" this:
 1. Contact the upstream for the repository and get them to fix the problem.
 2. Reconfigure the baseurl/etc. for the repository, to point to a working
 upstream. This is most often useful if you are using a newer
 distribution release than is supported by the repository (and the
 packages for the previous distribution release still work).
 3. Disable the repository, so yum won't use it by default. Yum will then
 just ignore the repository until you permanently enable it again or use
 --enablerepo for temporary usage:
 yum-config-manager --disable repoid 
 4. Configure the failing repository to be skipped, if it is unavailable.
 Note that yum will try to contact the repo. when it mands,
 so will have to try and fail each time (and thus. yum will be be much
 slower). If it is a very temporary problem though, this is often a nice
 compromise:
 yum-config-manager --save --setopt= repoid .skip_if_unavailable=true
Cannot find a valid baseurl for repo: base/7/x86_64
这种出错实际上含意便是你的centos系统软件互联网堵塞,不敢相信可使用指令 ping 114.114.114.114 检测。
处理方法:改动网口配备文档

进到网口配备文档所属文件目录:# cd /work-scripts/
编写网口配备文档(下面的图红框中的文档):# vi ifcfg-ens33 (无需系统软件将会文档名不一样)
截图
将文档中的最终一行的ONBOOT=no 改成ONBOOT=yes,以下图

截图

储存文档并撤出vi(按esc 随后 键入 :wq),work:# work restart 难题处理。能够再试一下Ping和yum


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